Structural unit



May 18, 1937. c. c. MADSEN STRUCTURAL UNIT 2 Sheets-Sheet l Filed Feb.10, 1956 ,s d M a f @w May 18, 1937. c. c. MADSEN STRUCTURAL UNIT FiledFeb. lO, 1936 2 Sheets-Sheet 2 Inventor ['a/rZ CMQ/sera Byuw s M lfornPatented May 18, 1937 -ATET OFFICE 2,080,618 STRUCTURAL UNIT Carl C.Madsen, LosAngeles,

Elwood C. Madsen,

Calif., assigner to Redlands, Calif.

Application February 10, 1936, Serial No. 63,231

2 Claims.

This invention relates to structural units and more particularly tostructural units of reinforced concrete.

An object of the present invention is to provide pre-cast reinforcedconcrete structural units which may be used for building walls or thelike.

An object of the present invention is to provide a pre-cast concretebuilding or wall unit which can be constructed at minimum cost therebytending to reduce materially the cost of constructing houses and thelike.

A further object of the invention is to provide a pre-cast structuralwall unit so equipped as to provide an air space after the inside wallnish has been applied to the unit.

A further object of the invention is to render it possible to pre-caststory high sections or units which may be transported to the place ofuse and which may be used upon previously 2Q constructed foundation.

The invention together with its objects and advantages will be bestunderstood from a study of the following description taken in connectionwith the accompanying drawings wherein:

Figure 1 is a longitudinal sectional view taken through portion of awall embodying the features of the present invention.

Figure 2 is an enlarged fragmentary detail sectional view taken at thebase or large edge of 30 one of the units.

Figure 3 is an enlarged detailed sectional View showing the manner ofanchoring two of the units together.

Figure 4 is a perspective view of one form of pre-cast unit.

Figure 5 is a similar View of a slightly modified form of unit, and

Figure 6 is a perspective view of a projection member adapted to be usedwith the type of wall unit shown in Figure 5.

In accordance with the present invention an entire Wall may beconstructed from one or more pre-cast reinforced concrete unitsinvolving the features of the present invention.

In Figure 1 is illustrated the manner of forming a wall from two unitsinvolving the features of the present invention and which units areindicated generally by the reference numerals 5.

In the form of the invention shown in Figures 1 to 4 inclusive unit 5consists of a slab or body 6 formed of concrete and preferably metalreinforced as at 1. Also the slab 5 has an integral concrete rim 8extending along all four sides thereof and projecting from one face ofthe slab.

Laterally spaced additional ribs 9 of concrete "are also provided onsaid one face of the Slab 6 and extend between opposed portions of therim 8. The ribs 8 and 9 will provide, after the inside wall nish hasbeen applied to the rim and rib equipped side of the slab 6 air spacesfor snsulation purposes.

Further in accordance with the present invention the rim 8 of the slabon three or four sides thereof, as determined by whether the slab is tobe used as a lower slab or a top slab, or whether a single slab is to beused in the construction of a single wall, is provided on the outersurface thereof with a continuous groove I I to receive the mortar orother binding material I2 used in anchoring and binding together tWoslabs as suggested, for example, in Figure 1.

Also the rim 8 at one edge of the slab 6 has suitably embedded therein,and as best shown in Figure 2 nipples I3 having upwardly projectingexternally threaded or plain ends to which conduits may be connected forforcing the motar or other binding material through the nipples and intothe grooves I Iv as is thought to be apparent.

The vertical portions of the rim 8, as well as the rib 9 are alsoprovided with recesses I4 if desired for the reception of wooden blocksor the like to facilitate securing of the inside wall finish to thebuilding units.

The rim 8 on all four sides of the slab is preferably reinforced by rodsI5 as best shown in Figure 1.

When using a pair of slabs 5 as shown in Figure 1 for constructing awall the lowermost slab 5 is placed on the concrete foundation I6 whilethe uppermost slab 5 rests on the upper side edge of the lower slab 5,the upper slab 5 also supporting the roof rafters I 'l ,as shown.

When a pair of units 5 are used tie bolts I8 have split ends anchored inthe concrete body of the foundation I6 and these bolts I8 extend throughopenings I9 provided in the lowermost flange or rim 8 of the lowermostslab 5. Nuts or the like 28 are threaded engaged with the upper ends ofthe tie bolts I8 for securing the slab to. the foundation.

At the meeting edges thereof the slabs 5 have contiguous rim portions 8provided with suitable openings 2l to accommodate additional bolts 22which latter may also be used for securing the angle bars or the like 23thereto, the angle bars being used for securing joists and the like 24to the wall formed by the slabs 5.

It will thus be seen that one or more pre-cast Cil concrete slabs 5 maybe used in forming the exterior Wall of a house or other suitable build-If desired the pre-cast reinforced concrete slab may, as shown in Figure6, be provided without a rim or ribs, the faces of the slab beingperfectly plain as shown in Figure 5 Wherein the slab is indicated bythe reference numeral 6.

In this second form of the invention in -lieu of the aforementioned ribsslab 6 has projecting from one side thereof substantially U-shapedprojections 25 arranged in transverse and Vertical rows as shown. K

The projections 25 are in the form of Wires bent into substantial Us andeach of the U- shaped projections has the sides thereof at theirterminals bent to provide hooks 26 which are embedded within. thematerial of the slab body E5V and are hooked into the metallicreinforcement of the slab body.

Having thus described the invention, what is claimed as new is:

1. A building unit comprising a reinforced concrete slab havingprojecting from one side thereof a. reinforced integral concrete rim,said rim being provided externally with a. continuousy groove and hollownipples; extending through the rim and communicating with the groove toprovide a conduit for feeding liquid bonding material to the groove.

2. A building unit comprising a, reinforced concrete slab havingprojecting from one side thereof a reinforced integral concrete rim,said rim being provided externally with a continuous groove, and hollownipples extending through portions of said rim, said nipples terminatingat their inner end at the groove, and having outer ends projectinginwardly from said rim to form a conduit for feeding liquid bondingmaterial to the grooves.

CARL C. MADSEN.

